Origin
Gizmo is a Mogwai who was purchased by Rand Peltzer for his son Billy. There are three very important rules that go along with owning a Mogwai, one never expose it to bright light (especially sunlight, which will kill it), two never get it wet (which will make it multiply); and, most importantly: never feed it after midnight (that will turn them into a Gremlin).
Other Appearances
MAD
Gizmo has appeared in Mad published by BSV.